Formation sampler



April 1, 1930. G. A. POOLE ET AL FORMATION SAMPLER FilledA April 20, 1929 n M m /V. f w f M V OOO.\\\| i n y Patented Apr. :1,

UNITED STATES vlm'rla'la'r OFFICE amm a. room; um scorer c. sommx, or roar woti'in, ams, assrenons To GULF PRDDUCTION COMBANY, OF'HOUSTONQTEXAS, A CORPORATIOIN 0F TEXAS :opinaron Samaritan Application led April 20, 1929.. Bernina-.258366.

This invention relates to devices for deter- -mining formation temperatures, pressures, oil gas ratios, and .water encroachment in oil wells. The primary object is to provide a device of this character that-is exceedingly useful in that the pressures in the well may be accurately determined.

Another object is to provide a device of 1 this type that is comparatively simple in co'nstruction and may be produced at a comparatively low cost.

More specifically, the invention contemplates a device having what might be termed a sampling chamber provided with outletand inlet valves and a second closure or barrier for normally preventing admission of fluids to said chamber. The inlet valve is adapted to be closed by'pressures within said chamber but by the use of the second closure, the

chamber may be evacuated through the outletvalve toproduce a vacuum therein. In this condition, thedevice is lowered inthe well nto .the desired point, after which the second closure or barrier is adapted to be ruptured, thereby permitting a quantity of oil and gas as it exists in that formation to enter the chamber where it is trapped by the 'closing of the inlet valves due to the then existing pressures in said chamber. f v With these and other'objects -in view, the invention consists in certain novel details of construction and combinations and arrangements of parts, all as will hereinafter be more fully described and the novel features thereof particularly pointed out in the appended claims.

In the accompanying drawings, F

Figures 1, 1*1 illustrate the present device in elevation; and

Figs. 2, 2a constitute a longitudinal sectional view thereof but with the several sections or parts disassembled.

Various alterations, of course may be made in the device illustrated, but 1n the preferred embodiment shown in the accompanying drawings, there is a comparatively long cylindrical body composed of a plurality of, sections that ymay be disconnected as shown.A

in Figs. 2, 2*.

line for lowering tolle device in the well.

'In'order to determine pressures-.within the well, air must be withdrawn from chamber 11 to create a vacuum therein until the device is positionedv within the well and it is desired to permit the contents of the well to enter said chamber. This is accomplished by providing said chamber with 'an inlet valve 15 held closed by pressures within the chamber and a barrier that will prevent the fluids in the well gaining access to said chamber until such barrier is removed, this not being permitted until the device is properly posi' tioned in the well. The preferred arrangement consists in having said inlet valve 15 carried by a tube 16 threadedin a section 17 attached to the lower end of section 10, a

glass' disk 18 being clamped against a shoulder 19 on section 17 by said tube. Preferably, a hard rubber ring 20 an`d a mesh screen 21 are interposed between lsaid glass disk and the tube. This glass disk, or whatever breakable material that may be'used in lieu thereof, forms a barrier that normallyrenders valve 15 and chamber 11 inaccessible after a vacuum has been created in the latter. To

the lower end of section 17 there Vis attached another-section 22 in which there is slidab y retained a plunger 24. v Said section 22 1s also formed 'wltlr a multiplicity of orifices 23 through which the contents of the 'well have access tothe interior of the device up to the barrier orjdisk 18. The lower end of plunger 24 is also formed to permit attachmentof an anchor, Ivthis end portion of said plunger being illustrated in the present instance as an ordinary sucker rod pin. 4

In use, the several sections and parts are assembled as shown in Figs. 2, 2, withthe exception of upper section 14anda1rexthen lowered the desireddistance in the usureise and out of said cham hausted from chamber 11 through valve 12. Section 14 is then applied to the device vand a sucker rod attached to the lowermost sectionto serve as an anchor. The device we 'and the maar closed in at the top of the stal tubing 'or well casing. After 4allowing suiiicient time for the well Vto build up' its rock pressure, the device is dropped suddenly to' the Ibottom with the result that plunger 24 will` rupture the barrier or glassdisk'18. This allpys the materials in the Well to pass t gh screen 21, tube 16 and inlet valve 15' ochamber 11, where it will be trap ed y s d'valve being closed by pressure t ein existing or built up in said chamber. The device is then withdrawn from the well and section 14 removed. @y attaching apressure gage to valve 12 a reading may be ren corded. This reading must be corrected for a calibrated 'instrument reading; the calibration depending upon the pressure necessary to raise valve 15. -In this way, the rock pressure is determined and a temperature reading Y may be taken from a thermometer in well 13. -A hose can then be attached to valve Y '12 and a gas test meter and the measurement asses at a slowL rate throu h the meter. A er thegas pres-v the device is inverted, a'l

of the gas recorded as it austed ventscrew released and the iluid allowed Y-to drain through valve 12 and accurately easured. 4The rates of' dissolved gas the oil may also then be calculated.

13;. What we claimis: 1 1. Ina device of the" character described, y vthe combination of'a tubular member hava chamber therein .anoutlet valve through which air may bcexhausted from 'the chamber, an automatically operable inlet in the bore-of said tubular member normally i access of fluids through said'memplunger loose in said member for rupturing said closure of a well. 1 2. In va device of the' character described,

' the combination of a metallic, non-collapsible tubular member having a chamber therein, valves Ycontrollintllie flow of fluids into a breakable closure in said tubular member normally preventing access of fluids to said inlet valve, and means tomof-awell s. In s dei of the emmer, described,

the combination .of a tubular member havdepth in a well.

and rupture said barrier. valve for 'said' chamber, a breakable closure Y Eleven to said inlet valve and chamber, and a flow of iiuids intoV and out of said chamber-,J

a breakable barrier in said'member normally preventing access to said inlet valve, and a plun er slidably carried by said tubular mem r adapted to rupture said barrier, said plunger normally projecting beyond the end of said member and having means for attaching a rod thereto.

6.` In a device of the character described,

' the -combination of a tubular member having a chamber therein with a duct extending from one end of saidv chamber, an outlet valve at `the opposite end of said chamber, an inlet 4.valve in said duct adapted to b e closed by Vpressuresbuilt 11p in said chamber, a breakable barrier in said duct preventing access of iiuids to said inlet valve, and means for rup urmg said barrier at will.

In a device Aof the character' described, .the combination of a tubular member having a chamber thereinwith a duct extending from one end of said chamber, an outlet valve at thefopposite end of said chamber,jan inlet valve in said Aduct adapted to be closed by p ...n built up in sa1d chamber, a breakable barrierin said duct preventing access of iluids to said'inlet valve,and a plungerA carried by saidmember adapted to impact l GERALD A. POOLE. sco'rr G, remuer.`

upon impact the bottom 'carried by said tubular member for fractur` n ing said closure upon impact against theboting a chamber therein valves controlling the iiow of fluids into. an out of said chamber,

turing-said breakable Barrier V3.5 -atanydesired' v Vns 

